US1298737A - Cutter-head. - Google Patents

Description

F. L. LANE & F. B. WEAVER.

CUTTER HEAD.

APPLICATION FILED AUG.2. 1917.

Patented Apr. 1,1919.

2 SHEETS-SHEET1 F. L. LANE & F. R. WEAVER" CUTTER HEAD.

APPLICATION FILED AUG-2.1917

1,298,73'7.- Patented 11,1919.

2 SHEET EET 2- Famtiiivl. Zane STATES PATENT OFFICE.

FRANKLIN L. LANE AND FRANK R. WEAVER, OF BELOIT', WISCONSIN, ASSIGNORS TO 1?..13. YATES MACHINE COMPANY, OF BELOI'I, WISCONSIN, A CORPORATION OF WIS- CONSIN.

To all whom it may concern:

Be it known. that we, FRANKLIN L. LANE and FRANK R. WEAVER, citizens of the United States, residing at Beloit, in the county' of'Rock and State of Wisconsin, have invented certain new and useful Improvements in Cutter-Heads, of which the following is a specification.

The invention relates to wood working machinery of the type disclosed in Patent 1,183,015, granted on May 16, 1916, to us for an improvement in cutter heads, and has for itsfobject the provision of a peculiarly eflicient mounting of the tools in a cutter head.

In order that the invention may be readily understood by those skilled in the art, a preferred embodiment of the same is set forth in the accompanying-drawings and in the description based thereon. As, however, the invention is susceptible of embodiment in other and varied constructional forms depending upon the material and the nature of the work to be performed, the drawing and description are to be taken in an illustrative and not in an unnecessarily limiting sense. In the drawings- Figure 1 is a face view of the cutter head;

Fig.2 is an'edge view of the same;

Fig. 3 is a section on the line 33 of Fig. 1'; r

Fig. 4 is a section on the line 44 of Fig. 1;

Fig. 5 is asection on the line 55 of 2; and v Fig. 6 is a'fragmentary view in edge elevation of theparts'sho'wn in Fig. 5.

In "the embodiment illustrated the cutter head, indicated at 11, has a convex or conically'beveled front face, the inclination to each other of those portions of the face on opposite sides of the center being slight and of such extent that when mounted with its shaft at a slight inclination to the horizontal, the lower portion of the operative face of the cutter head will occupy a vertical position, or in a plane parallel to the plane of travel of the stock through the machine at the line of'cont'actwith the stock, while the upper portion of the face will lie in a plane at an angle'to the vertical and at'an angle to the plane of the travelof the stock.

IVithin the cutter head are mounted a plurality' of knives 12 extending radially of the operative face with their cuttingedges conforming to'the bevel of theconed face of the Specification of Letters Patent.

CUTTER-HEAD.

Application filed August 2, 1917. Serial No. 184,137.

a head and substantially flush with said front face. These knives are mounted within slots 13 of the cutter head in conjunction with gibs 14 which are wedge shape and disposed with their thinner ends outwardly as most clearly shown in Fig. 4. The gib 14 has tapped into it a threaded screw 15 encircled by a compression spring 16. The head 15 of the screw bears upon the outer or rear end ofthe spring 16 while the inner end of the spring seats-upon the bottom of a bore 17 within which the shank ofthe screw and the spring 16 are accommodated. Alongside the wedge-shape slot '13 within which the lmife and gib are mounted is a companionslot 18 within which is disposed a wedge block 19 arranged with its smaller end towardthe working face of the cutter head'and having its face bored as indicated at 20 to serve as a-bearing for the screw 21 threaded in the cutter head and having a squared head 21 projecting from the rear of the cutter head for purposes of adjustment; the engagement of the end of the screw '21 with the bore or recess 20 also serving to prevent lateral displacement of the block 19 relative to the screw 21.

It will be observed'that coacting faces of the gib 14 and the'wedge block 19 lie in a plane including th axis of the cutter head whereas the extreme faces of said members lie in converging planes intersecting and inclined to the axis of the cutter heads. The slots 13" and 18 are open to the edge of the cutter head as indicated in Fig. 2.

' In assembling the knives, the gibs and the wedge blocks, they are dropped into the opening or slot from the periphery of the cutter head, the screws 15 are then threaded into the gibs 14 whereby the said gibs are resiliently held with their bases in contact with the bottom of the slot, the bore 17% connecting the bore 17 with the slot, being slightly larger than the screw 15 so as to permit of a slight lateral movement of the gib 14 toward and fromknives 12. The knives 12 having been properly positioned within the slot 13 to efi'ect their cutting function, the screw 21 is then adjusted by means of its head 21v so as to force the wedge block '19 outwardly and thereby crowd the, gib 14 firmly against the knife 12, lockingthe same securely in position. 1

About the peripheral margin of the cutter face, intermediate the radial knives 12, are

disposed a number of shorter knives 22 having cutting edges 23. These knives are mounted in the following. manner: In the edge of the cutter head are the requisite number of radial bores 24 and alongside thereof and cutting the same are a number-of edge notches or slots extending parallel to the cutter head axis; These slots 25have a bottom wall 26 extending at right angles to the axis of the bores 24 and side wall 27 extending parallel to said axis. The third wall of the slot is made up of two inclined portions 28 and 29 as clearly shown in Fig. 1, these two walls 28 and 29 being arranged at a gentle inclination to the axis of the bore 24. The knife 22 having been dropped int the slot 25 which is also open to the working face of the cutter head, a gib 30 is nextin serted froin the'rear or face of the head,

this gib being pentagonal in cross section as clearly shown in Fig. 5 and having its several faces parallel to the several walls of the slot 25. Previous to the insertion of the gib 30, however, the wedge block 31 is dropped from the edge of the head into the radial bore 24. This wedge block, as shown in Fig. 5, has one of its sides cut away to form an inclined surface which is parallel to the wall 28 of the slot 25, this inclined wall 31 being consequently parallel to one of the inclined faces of the gib 30 and adapted for cooperation therewith. Within the wedge block 31'is threaded a screw 32, the lower end of which has a bearing seat in the reduced bottom of the bore 24 at 33, said screw being provided with a squared head 32 for its adjustment.

The knife 22 and the gib 30 having been dropped into place as previously stated, with the inclined face of the gib bearing upon the inclined face 31 of the wedge block, and the knife 22 having been correctly positioned to effect its cutting function, the screw 32 is turned by means of its head 32 and the wedge block 31 is thereby forced radially of the cutter head, acting to crowd the gib 30 against the knife 22 and thereby hold the latter firmly in position.

It will be observed that by the provision made, the cutting tools or knives 12 and 22 are readily assembled and rigidly held in operative position. It will be readily understood that, in practice, the parts having been once assembled, the lmives may be readjusted as to position and may also be replaced and renewed without removing the wedge block and gib, merely loosening upon the screws 21 and 32 respectively whereby the knives will be relieved of the pressure of their gibs and may be readjusted or replaced.

We claim:

1. A tool mounting comprising a cutter head having formed in its face a. slot with rearwardly diverging walls, a knife disposed in said slot against one of the walls thereof, a pair of inwardly thickened wedge blocks disposed in the slot alongsidethe knife, one block bearing against/the knife and the second against the opposite wall of the slot, 1 and a screw threaded in the cutter head and bearing upon the base of the second wedge block from the rear, whereby the wedge block may be forced forwardly to exert lateral wedging action through the 'wedge block from the rear, whereby the wedge block may be forced forwardly to exert lateral wedging action upon the knife through the gib, and means to counteract any tendency of the gib to move forwardly with the wedge block.

3. A tool mounting comprising a cutter head having formed in its face a slot with rearwardly diverging walls, a knife disposed in said slot against one of the walls thereof, a gib lying in the slot alongside the knife, means for exerting tension rearwardly on the gib, an inwardly thickened wedge block disposed in the slot alongside the gib and knife, and a screw threaded in the cutter head and bearing upon the base of the wedge block from the rear, whereby the block may be forced forwardly to exert lateral wedging action upon the knife through the gib.

4. A tool mounting comprising a cutter head having formed in its face a slot with rearwardly diverging walls, a knife disposed in said slot against one of the walls thereof, a rearwardly thickened wedgeshaped gib lying in the slot alongside the knife, a screw threaded in the base of the gib from the rear, a compression spring encircling the screw whereby to provide means for exerting adjustable tension rearwardly on the gib, an inwardly thickened wedge block disposed in the slot alongside the gib and knife, and a screw threaded in the cutter head and bearing upon the base of the wedge block from the rear, whereby the block may be forced forwardly to exert lateral wedging action upon the knife-through the gib.

5. A tool mounting comprising a cutter head having formed 1n its face a plurality of slots with rearwardly diverging walls,

of the walls thereof, rearwardly thickened wedge-shaped gibs lying in the slots alongside the knives, screws threaded in the base of the gibs from the rear, compression springs encircling the screws whereby to provide means for exerting adjustable tension rearwardly on the gibs, inwardly thickened wedge blocks disposed in the slots alongside the gibs and knives, and screws threaded in the cutter head and bearing upon bases of the wedge blocks from the rear, whereby the blocks may be forced forwardly to eXert lateral wedging action upon the knives through the gibs.

In testimony whereof we hai e hereunto 15 signed our names in the presence of two subscribing witnesses.

FRANKLIN L. LANE. FRANK R. WEAVER. Witnesses:

F. A. HORSTMANN, PH. A. GosTMAN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. 0.

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